Nonmetallic sheath cable connector



1949- G. T. EVANS 2,479,223

NONMETALLIC SHEATH CABLE CONNECTOR Filed Oct. 28,1947

' INVENTOR. @enzld KA A/c7775 ATTORNEYS UNITED STATES OFFICE NONMETALLICSHEATH CABLE CONNECTOR Gerald T. Evans, Brazil, Ind.

Application October 28, 1947, Serial No. 782,547

2 Claims.

This invention relates to a cable connector for electric non-metallicsheath cables.

It is an object of the present invention to provide a connector suitablefor connecting nonmetallic sheath cables within outlet openings inswitch boxes and the like. The connector is adapted to be fitted intothe box by contracting a split sleeve and thereafter securing cableretaining parts within the sleeve.

Other objects of the present invention are to provide a connector fornon-metallic sheath cables, which is of simple construction, easy toinstall on a switch box, inexpensive to manufacture and efiicient inoperation.

For a better understanding of the invention, reference may be had to thefollowing detailed description taken in connection with the accompanyingdrawing, in which:

Figure 1 is a fragmentary elevational view of a box with the connectorof the present invention fitted therein, and retaining a non-metallicsheath cable therein;

Figure 2 is a side elevational view of the assembly shown in Figure 1;

Figure 3 is a vertical sectional view of the connector and box, taken online 33 of Figure 1, with the cable removed; 7

Figure 4 is a side elevational view of the split ring and groove forretaining the connector in the box opening;

Figure 5 is a vertical sectional view of the split ring taken on line 55of Figure 4;

Figure 6 is a plan view of one retaining part;

Figure 7 is a perspective view of the internal insulating member andFigure 8 is a plan View of the other retaining part.

Referring now to the figures, I represents a fragment of an outlet on aswitch box having an opening I I therein adapted to receive my connectorI2 for retaining and supporting a cable I3 of the non-metallic sheathtype within the opening II.

My connector I2 comprises a spring rin I4 having a transverse split I5,whereby the ring can be compressed in order to permit its movementthrough the opening I I, so that the annular groove I6, in thecircumferential wall of the ring I4 will be adapted to receive theperipheral edge of the opening II. Opposed ears I I and I8,respectively, are formed in the ring I4 by cutting the cars from thebottom of the groove I6 at the split I5, as shown in Figure 5. Theseears engage the peripheral edge of the opening II, to

prevent rotation of the ring I4 with the opening I I, when the screw 24is tightened.

Fitted into spring ring I4, is an insulating member I9, Figure 7, havinga concave recess 20 in the top thereof for supporting the cable I3. Thecable I3 has a non-metallic sheath 2I for two internal wires 22, whichare insulated in the conventional manner. The insulating member I9 hasan opening 23, through which may be ex-' tended a fastening screw 24.This fastening screw 24 extends through an opening 25 in a large plate26, Figure 6, and is threadably connected with a small plate 21, Figure8, by means of the tapped opening 28 therein. The plates 26 and 21 areof the same diameter, and will fit within the ring I4. Both plates areprovided with a concave recess 29, which is of the same size as therecess 20 in the member I9. The plate 26, however, is provided with alug 25, which fits within ,a recess 30 formed at the split I5 of thering I6. The lug permits better clamping action, and prevents the plates26 and 21 and member I9 from being pushed through the spring ring I4.

When the screw 24 is tightened, the member I9 is compressed between theplates 26 and 21 to bind the cable within the spring ring I4. This isshown in Figure 1, and more clearly in Figure 3, wherein the member I9has been compressed so that the recess 20 is of smaller diameter thanthe recess 29 in the plate. The member I9 will also, under compression,tend to more firmly bind the spring ring I4 within the opening I Therehas thus been provided a connector for an electric non-metallic sheathcable that will accomplish the objects of the invention, and it is to beunderstood that various changes may be made'in the details ofconstruction, providing that such changes lie within the spirit andscope of the present invention, as defined by the appended claims.

I claim:

1. A connector for non-metallic sheath cables, comprising a spring splitring adapted to fit an opening of a switch box, said ring having meansthereon for securing the same within the opening, an insulating memberhaving a top recess for receiving the cable and adapted to be fitted inthe ring, and retaining means within the ring on opposite sides of themember for securing and compressing the member against the cable toprevent longitudinal displacement of the cable within the ring, and saidretaining means comprising a pair of plates having a recess in the topthereof to receive the cable, a depending lug on one of said plates, arecess in said split ring to receive the 7 REFERENCES CITED lug andScrew extendmg between the plates The following references are of recordin the and through said member. file of this patent,

2. A connector as defined in claim 1, wherein the means for retainingthe ring in the opening 5 UNITED STATES PATENTS. in the switch boxcomprises a circumferential Number Name Date/ groove formed in the outersurface of the ring, 1 192 150 Appleton July 25 1916 centrally thereof,and opposed ears on said ring 1473812 Clements Nov 1923dependingbelomthe rin at thesplititherein. j j '5 j 1 GERARD T. EVANS-2,2'76,969 ,H eimchen :Mar 17, 1942

